Function isa_string_extensions

cranelift/native/src/riscv.rs:87–98

Parses an ISA string and returns an iterator over the extensions.

(isa: &str)

/// Parses an ISA string and returns an iterator over the extensions.
fn isa_string_extensions(isa: &str) -> Vec<&str> {
    let mut parts = isa.split('_');
    let mut extensions = Vec::new();
    // The first entry has the form `rv64imafdcvh`, we need to skip the architecture ("rv64").
    // Each of the letters after the cpu architecture is an extension, so return them
    // individually.
    if let Some(letters) = parts.next().unwrap().strip_prefix("rv64") {
        extensions.extend(letters.matches(|_| true));
        extensions.extend(parts);
    }
    extensions
}

#[cfg(test)]
mod tests {